Aiding in a satellite positioning system
DCFirst Claim
1. An aided Global Positioning System (GPS) subsystem within a wireless device, wherein the wireless device has a wireless processing section having a wireless processing section clock, the wireless processing section capable of receiving signals from a wireless network including a network clock signal and capable of generating a first offset indicative of the difference between the network clock and the wireless processing section clock, and the GPS subsystem has a radio frequency (RF) front-end capable of receiving a GPS satellite signal, the aided GPS subsystem comprising:
- a GPS clock; and
a GPS processor section that receives the GPS clock and at least one signal from the wireless processing section including the first offset, and in response produces at least one acquiring signal that is utilized by an acquiring unit to acquire the GPS satellite signal.
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Abstract
The invention relates to an aided Global Positioning System (GPS) subsystem within a wireless device. The wireless device includes a wireless processing section capable of receiving signals from a wireless network and a GPS subsystem having a radio frequency (RF) front-end capable of receiving a GPS satellite signal. The wireless processing section of the wireless device receives an external clock and determines the offset between the clock in the wireless processing section and that of the external clock. The GPS subsystem then receives the offset information from the wireless processing section, information related to the nominal frequency of the wireless processing section clock and the wireless processing section clock. Using this information and the GPS clock in the GPS subsystem, the GPS subsystem determines an acquiring signal, which is related to a frequency offset between the GPS clock and the network clock. The GPS subsystem then acquires GPS satellite signals in an acquiring unit though the use of the acquiring signal.
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Citations
30 Claims
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1. An aided Global Positioning System (GPS) subsystem within a wireless device, wherein the wireless device has a wireless processing section having a wireless processing section clock, the wireless processing section capable of receiving signals from a wireless network including a network clock signal and capable of generating a first offset indicative of the difference between the network clock and the wireless processing section clock, and the GPS subsystem has a radio frequency (RF) front-end capable of receiving a GPS satellite signal, the aided GPS subsystem comprising:
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a GPS clock; and a GPS processor section that receives the GPS clock and at least one signal from the wireless processing section including the first offset, and in response produces at least one acquiring signal that is utilized by an acquiring unit to acquire the GPS satellite signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An aided Global Positioning System (GPS) subsystem within a wireless device, wherein the wireless device has a wireless processing section having a wireless processing section clock, the wireless processing section capable of receiving signals from a wireless network including a network clock signal and capable of generating a first offset indicative of the difference between the network clock and the wireless processing section clock, and the GPS subsystem has a radio frequency (RF) front-end capable of receiving a GPS satellite signal, the aided GPS subsystem comprising:
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a GPS clock; means for receiving the GPS clock and at least one signal from the wireless processing section including the first offset; and means for producing in response to the receiving means at least one acquiring signal that is utilized by an acquiring unit to acquire the GPS satellite signal. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A method for aiding a Global Positioning System (GPS) subsystem within a wireless device, wherein the wireless device has a wireless processing section capable of receiving signals from a wireless network and the GPS subsystem has a radio frequency (RF) front-end capable of receiving a GPS satellite signal, the method comprising:
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receiving a GPS clock, wireless processing section clock, message having information related to the wireless processing section clock nominal frequency, and a message having information related to an offset between the wireless processing section clock and a network clock external to the wireless device; determining am acquiring signal in response to receiving the GPS clock, wireless processing section clock, wireless processing section clock nominal frequency message, and the offset message, wherein the acquiring signal is related to a frequency offset between the GPS clock and the network clock; acquiring the GPS satellite signal in an acquiring unit that utilizes the acquiring signal. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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24. A signal-bearing medium having software for aiding a Global Positioning System (GPS) subsystem within a wireless device, wherein the wireless device has a wireless processing section capable of receiving signals from a wireless network and the GPS subsystem has a radio frequency (RF) front-end capable of receiving a GPS satellite signal, the signal-bearing medium comprising:
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logic for receiving a GPS clock, wireless processing section clock, message having information related to the wireless processing section clock nominal frequency, and a message having information related to an offset between the wireless processing section clock and a network clock external to the wireless device; logic for determining an acquiring signal in response to receiving the GPS clock, wireless processing section clock, wireless processing section clock nominal frequency message, and the offset message, wherein the acquiring signal is related to a frequency offset between the GPS clock and the network clock; logic for acquiring the GPS satellite signal in an acquiring unit that utilizes the acquiring signal. - View Dependent Claims (25, 26, 27, 28, 29, 30)
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Specification